Here is the full list of all 37 Gas Station Simulator: Prologue - there are Early Days achievements.
You found "Rudy"
Hit a trash can!
Served your first customer in the shop.
Served 50 custoemrs in the shop.
Got a tip during a minigame.
Got a total of 10 tips during minigames.
Got a total of 50 tips during minigames.
Fuel a car within 0.2L of the requested fuel.
Fuel a car within 0.1L of the requested fuel.
Fuel a car within 0.01L of the requested fuel.
Hit trash can with a score of over 25!
Hit trash can with a score of over 50!
Complete a race in the RC Car.
Fuel your first car.
Fueled 10 cars.
Fueled 50 cars.
Ordered fuel to be delivered to the Gas Station.
Ordered a Garbage Truck to collect your trash.
You've been visited.
Bought / Found a decoration
Broke into a car trunk.
Broke into 10 car trunks.
Broke into 20 car trunks.
Gas Station Simulator Prologue Completed
Scared off Dennis.
You let it run away from you didn't you?
Painted something!
Painted 10 Objects.
Painted 25 Objects
Picked up a trash item.
Cleaned up 50 Trash Items
Cleaned up 100 Trash Items
Managed to get really high into the air.
A flying car. Who would have thought? Not us.
Cleaned up one floor stain.
Cleaned up 25 Floor Stains.
Cleaned up 100 Floor Stains